Need help/ guidence

So I have never done this but from my school I recently got a dell precision T7910 for free as they were going to toss it out and I thought I could use it as a back up server for my projects and files as I go through school or use it as a media server to kinda get rid of all my subscriptions. I do know I want to run a linux server distro on there but as I have stated I’ve never done anything like this as im still in school and learning but heres is what I do know about this dell.

  1. It has 2 Intel Xeon E5-2690V4 SR2N2 2.60GHz 14-Cores each
  2. only 8gb of ddr4 ecc ram for each processor,
  3. no graphics card
  4. no HDDs or SSDs ( I do have one 1TB HDD 3.5", and a 500GB SSD 2.5" lying around somewhere )
  5. It does power on and run but no OS installed

I am a disabled Vet who is on a tight income so I will try to buy what I can when I can but a general list of items i will need eventually would be appreciated and any recommendations would be gladly welcomed! Thank you to any and all who read and respond!